While I have loved the innovation of Sony over the years, this one is a little odd. If Sony had thought about this, they would have realised that most people these days already have a viable handheld device, a smartphone. Microsoft got that one right by making remote play work so well on most mobile devices with connection to a pad. I just feel Sony should have done the same.
That said, I get there are some benefits if you have a shared screen and cannot always get on your PS5 but is that worth the money? I am not too sure.
Still, this is the early days and Sony will likely have a bigger vision for it. I mean, being able to connect to any network and play games remotely would be a huge step.